Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper MF band and all of the HF band). They are the primary medium for applications such as maritime communications, international broadcasting and worldwide amateur radio activity because they take advantage of ionospheric skip propagation to send data around the world. The bands are conventionally stated in wavelength, measured in metres. Propagation behavior on the shortwave bands depends on the time of day, the season and the level of solar activity.
Read more about Shortwave Bands: International Broadcast Bands, Amateur HF Bands, Marine, Air, Land Mobile and Fixed Allocations, Military HF Use, Industrial/Scientific/Medical (ISM) and Other HF Allocations
Famous quotes containing the word bands:
“Nearly all the bands are mustered out of service; ours therefore is a novelty. We marched a few miles yesterday on a road where troops have not before marched. It was funny to see the children. I saw our boys running after the music in many a group of clean, bright-looking, excited little fellows.”
—Rutherford Birchard Hayes (1822–1893)